Massive memory leak in 3106

Discussion in 'Parallels Desktop for Mac' started by Bluecoat93, Jan 5, 2007.

  1. rhind

    rhind

    Messages:
    84
    That's not true. XP shouldn't be able to cause Parallels to continuously use more memory over a limit. If something in XP is leaking memory, then when it has filled up the physical RAM you assigned to the VM, it will start swapping to its swap file which is stored in your VM image and will start filling up your VM image. Plus you'll get warnings from XP when you swap file is running low on space and needs expanding (this usually happens automatically unless you've fixed the size f the swap file in XP).

    So if Parallels is still constantly increasing memory and never stops then something in the app is still leaking.

    In 3120 with show live screenshot on, my VM has been up for 5.5 hours and under fairly heavy strain as I'm compiling quite large projects under Borland C++ Builder and Visual Studio 2005 and parallels is still only using 812Mb RAM. Given there is 16Mb VRAM assigned to the VM also, then I'm not going to start worrying about things until it gets to over 900MB. If it is still steadily increasing at that (sort of 100Mb over your VM memory size) then that probably indicates a leak somewhere.

    But your XP installation shouldn't be able to cause this.

    Cheers

    Russell
     
  2. Bluecoat93

    Bluecoat93

    Messages:
    7
    Unfortunately, I have always had "Show live screen shot" and "Show applications in dock" disabled. I still see between 0.04 and 0.06 MB of real memory growth per second, and my Parallels VM still crashes when being left on overnight.

    The memory growth happens even when no VM is running (when Parallels is first started up, before a VM configuration is even loaded into memory). The rate of growth doesn't seem to change when a VM is running. It stays pretty constant at 0.04-0.06MB/sec.
     
  3. palter

    palter

    Messages:
    243
    Time said to turn "Show live screen shot" on not off.
     
  4. rufosx

    rufosx

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    22
    Turning ON Show Live screen has significantly helped me. Real memory usage on launch of a VM used to shoot up to about what the memory allocation to the VM was. Now, it only goes up to 90 MB on launch.

    It might still be climbing a tiny bit (and MallocDebug shows a tiny leak around the same place as the much larger leak this fixed), but I should be able to get full days out of multiple VMs before having an issue.
     
  5. richmason

    richmason

    Messages:
    9
    yep...I've got the same issue

    Macbook C2D..build 3120. XP SP2
     
    Last edited: Jan 13, 2007
  6. Mac Pro 5GB

    Mac Pro 5GB Bit Poster

    Messages:
    64
    I do not have a memory leak problem but I just did something that was very interesting. I do not use a Boot Camp partition but just the normal Windows XP SP2 VM. I started up Parallels and started my VM as usual. I looked at the activity monitor and saw I had about 430MB or so of real memory and 2.3GB of virtual memory for the Parallels app. I then clicked the red close button on the top left hand side of the Parallels Window XP window and the window closed. I then started it up again from the Parallels green arrow button and now it only uses about 1/2 of the real memory I was using previously. I open a bunch of programs and it still does not climb as high as it did from a fresh start from a fresh launch of the Parallels program.

    Maybe people who are having a memory leak should try this. With your VM running click the red close button on the top left of the Parallels window and then restart your VM and see what happens?
     
  7. Mac Pro 5GB

    Mac Pro 5GB Bit Poster

    Messages:
    64
    I just looked at a couple of other things. When I use the start menu and the turn off computer button the winxp.mem file in my Parallels folder goes away when Windows shuts down. If I use the click the red close window button on the top left of the Parallels window when my VM is running I get another file in my Parallels folder that is winxp.sav. The winxp.mem file stays there as well. Then I restart my VM and the winxp.sav file goes away and the winxp.mem file is still there and my VM starts up again but uses a lot less real memory to run. I still do not have any memory leak problems.
     
  8. Mac Pro 5GB

    Mac Pro 5GB Bit Poster

    Messages:
    64
    It seems like it takes more real memory to create the winxp.mem file than to restart and run a VM from on that is already there.
     
  9. Mac Pro 5GB

    Mac Pro 5GB Bit Poster

    Messages:
    64
    It also looks like clicking the red close window button does the same thing as suspend virtual machine.
     
  10. Mac Pro 5GB

    Mac Pro 5GB Bit Poster

    Messages:
    64
    Definitely when I bring my VM back from suspended mode it uses much less real memory than starting the VM from launch.
     
  11. nevrozel

    nevrozel

    Messages:
    7
    I confirm the memory leak on a MBP Core2Duo with 1GB of DDR. When I load Parallels it takes around 200MB; then in starts taking up constantly with around 0.5MB/sec and it doesn't stop. Virtual memory starts form 2GB. i have disabled the dock preview but still the same.
     
  12. rhind

    rhind

    Messages:
    84
    You need to *enable* show live screen shot in dock to stop the memory leak related to that option, not disable it. Are you running 3120 also?

    Cheers

    Russell
     
  13. CountZero

    CountZero

    Messages:
    43
    I tried the enable live screen shot view option but I start getting random crashes instead. So I turn it back off and the random crashes stop. Weird...

    (I definitely try some memory leaks over random crashes)
     
  14. nevrozel

    nevrozel

    Messages:
    7
    Oh, I understood it the other way round. Well, I'm going to disable it and see what happens. Yes, I'm running the latest Beta.

    I just ordered another gig of RAM. Am I going to feel the difference in performance if I give XP 1GB instead of 512MB of RAM?

    Thanks.
     
  15. CountZero

    CountZero

    Messages:
    43
    Definitely. XP should run much better with anything above 768MB.
     
  16. luz

    luz

    Messages:
    87
    Yes, but that's not what I claimed. The rate is now so low that it would take weeks to reach the limit at all, so I simply don't know if this is inside or outside the VM. I just see real memory getting allocated at a low, but seemingly constant rate, so this indicates a small leak somewhere. It might be Parallel's or XP's code causing that.
     
  17. rhind

    rhind

    Messages:
    84
    XP will only be able to cause memory usage to increase in OS X up to the limit you set when you assigned RAM to the VM. Plus the VRAM assigned to the VM. Then a little overhead from Parallels itselft (~50Mb according to Tim).

    So if you are seeing memory usage above this limit and still increasing, then it must be something leaking in Parallels. XP can't allocate memory outside what is given to it as a VM so it can't cause a leak in OS X.

    Cheers

    Russell
     
  18. nevrozel

    nevrozel

    Messages:
    7
    rhind said a clever thing. How could XP eat more RAM than you give it? I'm going to try and let XP open for a long time so I can see if he stops eating RAM when reaching its limit.

    Indeed, enabling live preview in the Dock seems to address this issue pretty well, although not completely. I'll come back with some more feedback.
     
  19. jkp

    jkp

    Messages:
    9
    Definately still leaking with the live dock icon enabled, maybe not as badly, but bad enough :/
     
  20. mrmkirsch

    mrmkirsch

    Messages:
    7
    I tried the suggested fix bit the memory still keeps leaking. It is leaking at the rate of 5 MB of real memory per second while XP is running.

    Pausing XP causes the memory leak to stop. And after resuming from pause, the leak slowed to about .4 MB per second, but after about a minute it picked up speed to about 5 MB per second again.
     

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